NMFStrategy   name and name<- gets and sets the name
  associated with an object. In the case of Strategy
  objects it is the the name of the algorithm.
name(object, ...)  ## S3 method for class 'Strategy':
name(object, all = FALSE)
  name(object, ...) <- value
name
  methodTRUE), or only the first (primary) one
  (FALSE).